From: Joseph Myers <joseph@codesourcery.com>
To: Alejandro Colomar <alx.manpages@gmail.com>
Cc: <gcc@gcc.gnu.org>, GNU C Library <libc-alpha@sourceware.org>,
Yann Droneaud <ydroneaud@opteya.com>
Subject: Re: stdc_bit_ceil(3) and wrapping
Date: Fri, 30 Dec 2022 20:56:53 +0000 [thread overview]
Message-ID: <e08827ea-1251-917a-a155-817f5d90c43d@codesourcery.com> (raw)
In-Reply-To: <9b662ccd-0f9d-963b-e1f6-d225c5a9c902@gmail.com>
On Fri, 30 Dec 2022, Alejandro Colomar via Gcc wrote:
> For the C standard, shifts have wrap around semantics for unsigned types:
Only if the shift count is nonnegative and strictly less than the width of
the type. This is about shifting by an amount equal to the width of the
type, which has undefined behavior.
--
Joseph S. Myers
joseph@codesourcery.com
next prev parent reply other threads:[~2022-12-30 20:56 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-12-30 19:53 Alejandro Colomar
2022-12-30 20:18 ` Yann Droneaud
2022-12-30 20:33 ` Alejandro Colomar
2022-12-30 22:33 ` Alejandro Colomar
2023-01-06 20:08 ` Alejandro Colomar
2022-12-30 20:47 ` Alejandro Colomar
2022-12-30 20:38 ` Joseph Myers
2022-12-30 20:46 ` Alejandro Colomar
2022-12-30 20:56 ` Joseph Myers [this message]
2022-12-30 21:01 ` Alejandro Colomar
2022-12-30 21:06 ` Alejandro Colomar
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